import fetch from 'dva/fetch';
import { notification } from 'antd';
import router from 'umi/router';
import hash from 'hash.js';
import mdf from 'react-native-md5';
import { isAntdPro } from './utils';

const codeMessage = {
  200: '服务器成功返回请求的数据。',
  201: '新建或修改数据成功。',
  202: '一个请求已经进入后台排队（异步任务）。',
  204: '删除数据成功。',
  400: '发出的请求有错误，服务器没有进行新建或修改数据的操作。',
  401: '用户没有权限（令牌、用户名、密码错误）。',
  403: '用户得到授权，但是访问是被禁止的。',
  404: '发出的请求针对的是不存在的记录，服务器没有进行操作。',
  406: '请求的格式不可得。',
  410: '请求的资源被永久删除，且不会再得到的。',
  422: '当创建一个对象时，发生一个验证错误。',
  500: '服务器发生错误，请检查服务器。',
  502: '网关错误。',
  503: '服务不可用，服务器暂时过载或维护。',
  504: '网关超时。',
  1119: '密码错误',
  1120: '用户不存在',
};

const checkStatus = response => {
  // console.log("response",response)
  // if (response.code >= 200 && response.code < 300) {
  //   return response;
  // }
  if (response.code == 0) {
    return response;
  }

  const errortext = codeMessage[response.code] || response.message;
  notification.error({
    message: errortext,
    description: `错误代码： [${response.code}]`,
  });

  const error = new Error(errortext);
  error.name = response.status;
  error.response = response;
  throw error;
};

const cachedSave = (response, hashcode) => {
  /**
   * Clone a response data and store it in sessionStorage
   * Does not support data other than json, Cache only json
   */
  const contentType = response.headers.get('Content-Type');
  if (contentType && contentType.match(/application\/json/i)) {
    // All data is saved as text
    response
      .clone()
      .text()
      .then(content => {
        sessionStorage.setItem(hashcode, content);
        sessionStorage.setItem(`${hashcode}:timestamp`, Date.now());
      });
  }
  return response;
};

/**
 * Requests a URL, returning a promise.
 *
 * @param  {string} url       The URL we want to request
 * @param  {object} [option] The options we want to pass to "fetch"
 * @return {object}           An object containing either "data" or "err"
 */
export default function baseRequest(url, option) {
  console.log('option', option);
  const options = {
    // expirys: isAntdPro(),
    // ...CHECK_HEADERS_OPITON,
    ...option,
  };

  // console.log("options",options)
  /**
   * Produce fingerprints based on url and parameters
   * Maybe url has the same parameters
   */
  const fingerprint = url + (options.body ? JSON.stringify(options.body) : '');
  const hashcode = hash
    .sha256()
    .update(fingerprint)
    .digest('hex');

  // const defaultOptions = {
  //   // credentials: 'include',
  // };
  // console.log("options",options);
  // console.log("options",Object.values(options).filter(function(obj) { console.log("obj",obj); return obj !=="GET" }));
  const newOptions = { ...options };

  if (
    newOptions.method === 'POST' ||
    newOptions.method === 'PUT' ||
    newOptions.method === 'DELETE'
  ) {
    // console.log("instanceof========",!(newOptions.body instanceof FormData))
    if (!(newOptions.body instanceof FormData)) {
      newOptions.headers = {
        Accept: 'application/json',
        'Content-Type': 'application/json; charset=utf-8',
        ...newOptions.headers,
      };
      newOptions.body = JSON.stringify(newOptions.body);
    } else {
      // newOptions.body is FormData
      newOptions.headers = {
        Accept: 'application/json',
        ...newOptions.headers,
      };
    }
  }

  const expirys = options.expirys && 60;
  // options.expirys !== false, return the cache,
  if (options.expirys !== false) {
    const cached = sessionStorage.getItem(hashcode);
    const whenCached = sessionStorage.getItem(`${hashcode}:timestamp`);
    if (cached !== null && whenCached !== null) {
      const age = (Date.now() - whenCached) / 1000;
      if (age < expirys) {
        const response = new Response(new Blob([cached]));
        return response.json();
      }
      sessionStorage.removeItem(hashcode);
      sessionStorage.removeItem(`${hashcode}:timestamp`);
    }
  }

  return (
    fetch(url, newOptions)
      .then(response => {
        // console.log("response-",response);
        if (newOptions.method === 'DELETE' || response.status === 204) {
          return response.text();
        }
        return response.json();
      })
      .then(checkStatus)
      // .then(response => cachedSave(response, hashcode))
      .then(body => {
        // console.log("body",body.code)
        // DELETE and 204 do not return data by default
        // using .json will report an error.

        if (body.code !== undefined && body.code > 0) {
          throw {
            status: body.code,
            message: body.message,
          };
        } else if (body.flag !== undefined && !body.flag) {
          throw {
            status: body.flag,
            message: body.message,
          };
        }

        return body;
      })
      .catch(e => {
        console.log('e', e);
        const status = e.status;

        if (status === 1121) {
          console.log(e.message);
          window.g_app._store.dispatch({
            type: 'login/logout',
          });
          return;
        }

        if (status === true) {
          console.log(e.message);
          // window.g_app._store.dispatch({
          //   type: 'login/logout',
          // });
          return;
        }

        // if (status === 401) {
        //   // @HACK
        //   /* eslint-disable no-underscore-dangle */
        //   window.g_app._store.dispatch({
        //     type: 'login/logout',
        //   });
        //   return;
        // }
        // environment should not be used
        if (status === 403) {
          router.push('/exception/403');
          return;
        }
        if (status <= 504 && status >= 500) {
          router.push('/exception/500');
          return;
        }
        if (status >= 404 && status < 422) {
          router.push('/exception/404');
        }
      })
  );
}
